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Tantalum Capacitor

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stangman517

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Dec 15, 2014
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Georgia, USA
Can someone please tell me the value of this capacitor. I'm guessing a 47uF or 4.7uF or 0.47uF??? ;-) I'm not a whiz at this. Searched the internet for help but I haven't found anything beneficial in my goal: how to determine the markings on these caps. Some were helpful but none that looks like this 40+ year old capacitor (C10 on IBM 5150 motherboard). I used an ESR meter on all of the Tantalums on this board and they all give a within range (not too high) ESR value except this one cap doesn't give either a high or low ESR either in circuit or not. Does this mean the capacitor is bad? My uneducated guess is it's bad. Can anyone help with this and recommend a good link so I can educate myself on these capacitors and how to ID them?
 

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A quick Internet search reveals this:

Read the first two digits of the numeric code. The first two digits are the significant digits. For example: A capacitor is marked with 224M. The first two digits of the value are 22.
Add the number of zeros indicated by the third numeric digit to the first two digits. The result is in picofarads. For example: The markings on a K5M capacitor read 224. Place four zeros after the 22 to obtain 220,000 picofarads: 220,000 picofarads = 0.22 microfarads.

So I would say 47picofarads. At least this is how I read it from this definition.
 
Not a tantalum. It is ceramic. Some details follow.

You have it out-of-circuit. Does a capacitance measurement using a meter measure close to that expected?

1704425774122.png
 
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